CN110523902A - A kind of internal tooth punch forming mechanism and its impact forming method - Google Patents
A kind of internal tooth punch forming mechanism and its impact forming method Download PDFInfo
- Publication number
- CN110523902A CN110523902A CN201910776752.XA CN201910776752A CN110523902A CN 110523902 A CN110523902 A CN 110523902A CN 201910776752 A CN201910776752 A CN 201910776752A CN 110523902 A CN110523902 A CN 110523902A
- Authority
- CN
- China
- Prior art keywords
- core
- tooth
- formation die
- upper pressing
- internal tooth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/06—Swaging presses; Upsetting presses
Abstract
The invention discloses a kind of internal tooth punch forming mechanism and its impact forming methods, the formation die core is fixedly connected with the workbench, the supporting element is fixedly connected with the formation die core, and it is located at the one end of the formation die core far from the workbench, first actuator is fixedly connected with the workbench, and the output end of first actuator is fixedly connected with the pushing core, the periphery for pushing core retainer plate and being located at the formation die core, the upper pressing core is slidably connected with the supporting element, and it is set on the supporting element at the axial line center of the upper pressing core, the upper pressing core is located at the top for pushing core, and the output end of second actuator is fixedly connected with the upper pressing core.Reach the equipment investment for reducing stamping parts and process investment, reduces processing cost, improve the purpose of production efficiency.
Description
Technical field
The present invention relates to field of machining more particularly to a kind of internal tooth punch forming mechanism and its impact forming methods.
Background technique
With the continuous development of automobile industry, domestic parts machining manufacture level is continuously improved, to the weight in gearbox
It is constantly soaring to want part tooth hub demand, and tooth hub structure constantly changes, manufacture difficulty is substantially improved.At present for center hole platform
Rank has the tooth hub of internal tooth, and it is mainly gear-broach machine processing that wherein the internal tooth at step is domestic at present.Draw broaching tool surface used in tooth
On have multiple rows of cutter tooth, each size and shape for arranging cutter tooth successively increase and change from incision end to cutting out end.When broaching tool is broached
When movement, each cutter tooth just cuts certain thickness metal from workpiece, finally obtains required size and shape.But it adopts
When with drawing the product in tooth processing stamping parts with step internal tooth, the equipment investment and process investment of stamping parts need to be increased, increased
Processing cost, reduces production efficiency.
Summary of the invention
The purpose of the present invention is to provide a kind of internal tooth punch forming mechanism and its impact forming methods, it is intended to solve existing
When using in technology draws the product in tooth processing stamping parts with step internal tooth, the equipment investment and process of stamping parts need to be increased
Investment, the technical issues of increasing processing cost, reduce production efficiency.
To achieve the above object, a kind of internal tooth punch forming mechanism and its impact forming method that the present invention uses, including
Workbench, supporting element, the first actuator, pushes core, upper pressing core and the second actuator, the formation die core and institute at formation die core
It states workbench to be fixedly connected, the supporting element is fixedly connected with the formation die core, and is located at the formation die core far from described
One end of workbench, first actuator are fixedly connected with the workbench, and the output end of first actuator and institute
It states pushing core to be fixedly connected, the periphery for pushing core retainer plate and being located at the formation die core, the upper pressing core and the supporting element are sliding
Dynamic connection, and be set on the supporting element at the axial line center of the upper pressing core, the upper pressing core is located at the pushing core
Top, second actuator is set to the surface of formation die core, and the output end of second actuator and the upper pressure
Core is fixedly connected.
Wherein, the formation die core is disposed with transition from top to bottom, faces section and material returned section directly.
Wherein, the tooth tip diameter on the transition is identical as the root diameter for facing section directly.
Wherein, the top tooth profile parameter of the transition and the ratio for facing tooth profile parameter directly for facing section directly be 0.1~
0.9。
Wherein, the taper of the transition is 8 °~10 °.
Wherein, the taper of the flank of tooth of the material returned section is 3 °~5 °.
The present invention also provides a kind of internal tooth impact forming methods, include the following steps:
It is mobile towards the pushing core that the upper pressing core supports tooth hub to be processed, and contacts with the pushing core；
The upper pressing core and the pushings core clamp tooth hub to be processed jointly and move towards the formation die core, and with it is described
Formation die core contact；
The formation die core carries out elongational flow to the tooth hub to be processed of forming material interference portion, completes tooth hub internal tooth
Processing.
Wherein, total high flute profile size depending on molding gear hub of the transition.
Wherein, the top tooth profile parameter of the transition carries out ratio contracting according to the tooth profile parameter of facing directly for facing section directly
It puts.
Wherein, just one-step forming is carried out to tooth hub to be processed using the transition, then using the section of facing directly to preliminary
Tooth hub after molding carries out shaping and finishing, is later separated molding gear hub with the formation die core using the material returned section.
A kind of internal tooth punch forming mechanism of the invention and its impact forming method pass through the formation die core and the work
It is fixedly connected as platform, the supporting element is fixedly connected with the formation die core, and is located at the formation die core far from the work
One end of platform, first actuator are fixedly connected with the workbench, and the output end of first actuator and it is described under
Pressure core is fixedly connected, and the periphery for pushing core retainer plate and being located at the formation die core, the upper pressing core and supporting element sliding connect
It connects, and is set on the supporting element at the axial line center of the upper pressing core, the upper pressing core is located at the upper of the pushing core
Side, second actuator is set to the surface of formation die core, and the output end of second actuator and the upper pressing core are solid
Fixed connection.Original drawing tooth technique is wherein replaced in such a way that mould punching is molding, to obtain the equipment for reducing stamping parts
Investment and process investment, reduce processing cost, improve the effect of production efficiency.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the part-structure sectional view of internal tooth punch forming mechanism of the invention.
It is the partial structure diagram of internal tooth punch forming mechanism of the invention that Fig. 2, which is of the invention,.
Fig. 3 is the structural schematic diagram of formation die core of the invention.
Fig. 4 is the top view of formation die core of the invention.
Fig. 5 is the overall structure diagram of internal tooth punch forming mechanism of the invention.
Fig. 6 is the flow chart of internal tooth impact forming method of the invention.
100- internal tooth punch forming mechanism, 10- workbench, 20- formation die core, 21- transition, 22- faces section directly, 23- is moved back
Material section, 30- supporting element, the first actuator of 40-, 50- push core, 60- upper pressing core, the second actuator of 70-, 200- internal tooth and strike out
Type method.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " length ", " width ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.In addition, in the description of the present invention, the meaning of " plurality " is two or more, unless otherwise specifically defined.
Referring to Fig. 1, the present invention provides a kind of internal tooth punch forming mechanism 100, including workbench 10, formation die core
20, supporting element 30, the first actuator 40, push core 50, upper pressing core 60 and the second actuator 70, the formation die core 20 with it is described
Workbench 10 is fixedly connected, and the supporting element 30 is fixedly connected with the formation die core 20, and it is remote to be located at the formation die core 20
One end from the workbench 10, first actuator 40 are fixedly connected with the workbench 10, and first actuator
40 output end is fixedly connected with the pushing core 50, the periphery for pushing core 50 and being set in the formation die core 20, described
Upper pressing core 60 is slidably connected with the supporting element 30, and the supporting element 30 is set at the axial line center of the upper pressing core 60
On, the upper pressing core 60 is located at the top for pushing core 50, and second actuator 70 is set to the surface of formation die core 20,
And the output end of second actuator 70 is fixedly connected with the upper pressing core 60.
In the present embodiment, first actuator 40 and second actuator 70 are cylinder, in original state
When, the centre bore of tooth hub to be processed is set on the supporting element 30, the upper mold core and the lower mold core not with it is to be processed
The contact of tooth hub, when needing to carry out internal tooth punching press to tooth hub to be processed, the output end elongation of first actuator 40, and then push away
It is mobile towards tooth hub to be processed to move the upper pressing core 60, until the upper pressing core 60 is contacted with tooth hub to be processed, thus institute
It states upper pressing core 60 and supports tooth hub to be processed on the supporting element 30, it is mobile towards the pushing core 50, in moving process,
Tooth hub to be processed is contacted with the pushing core 50, and the upper pressing core 60 and the core 50 that pushes press from both sides tooth hub to be processed later
It holds, the output end of first actuator 40 continues to extend, and the output end of second actuator 70 is shunk, so that clamped
Tooth hub to be processed is moved towards the formation die core 20, and is contacted with the formation die core 20, to be processed what is be clamped
During tooth hub is contacted with the formation die core 20, tooth hub to be processed and the 20 material interference part of formation die core can be by
Drawing force and flow, to form tooth form, the processing to tooth hub internal tooth is completed with this, complete tooth hub internal tooth processing after, institute
It states the first actuator 40 and second actuator 70 resets, next tooth to be processed is then arranged on the supporting element 30
Hub returns to original state.It, can be by the internal tooth wherein by replacing original drawing tooth technique in such a way that mould punching is molding
Moulding process is added in punch forming, to reduce the equipment investment and process investment of stamping parts, is reduced processing cost, is promoted
Production efficiency.
Further, the formation die core 20 is disposed with transition 21 from top to bottom, faces section 22 and material returned section 23 directly.
Tooth tip diameter on the transition 21 is identical as the root diameter for facing section 22 directly.The top tooth form of the transition 21 is joined
The several and ratio for facing tooth profile parameter directly for facing section 22 directly is 0.1~0.9.The taper of the transition 21 is 8 °~10 °.Institute
The taper for stating the flank of tooth of material returned section 23 is 3 °~5 °.
In the present embodiment, the formation die core 20 is disposed with the transition 21 from top to bottom, described faces directly
Section 22 and the material returned section 23, and the transition 21, the tooth profile parameter design for facing section 22 and the material returned section 23 directly
The relevant parameter of the molding tooth is depended primarily on, and after the completion of the design for facing section 22 directly, the transition 21
Design with the material returned section 23 is completed.During clamped tooth hub to be processed and the formation die core 20 contact,
Tooth hub to be processed successively by the transition 21, described face section 22 and the material returned section 23, the transition 21 and institute directly
State face directly section 22 material interference part can tension stretch and flow, thus by the internal tooth punch forming of tooth hub, wherein it is described gradually
Punching press can be carried out to tooth hub to be processed by becoming section 21 so that the first one-step forming of the internal tooth of tooth hub, it is described later face section 22 directly can
Final molding and finishing are carried out to preliminary molding tooth hub internal tooth, are 8 °~10 ° by the taper that the transition 21 is arranged,
So that the contact area of tooth hub to be processed and the transition 21 is stepped up, then the tooth quantity of formed of tooth hub to be processed is gradually
Increase, the tooth tip diameter on the transition 21 is designed according to the root diameter for facing section 22 directly, can release institute with this
The tooth tip diameter stated on transition 21 is identical as the root diameter for facing section 22 directly.The top tooth profile parameter of the transition 21
It is to carry out scaling according to the tooth profile parameter of facing directly for facing section 22 directly, and the top tooth profile parameter of transition 21 and described straight
The ratio for facing tooth profile parameter directly of face section 22 is 0.1~0.9.Since the taper of the flank of tooth of the material returned section 23 is 3 °~5 °, because
This is faced directly after 22 pairs of tooth hub internal tooths of section carry out final moldings and finishing described, the material returned section 23 can facilitate tooth hub internal tooth with
It is separated between the formation die core 20, facilitates the material returned of tooth hub, by the calculating to size, obtain the formation die core 20
Design size, and the size before the molding of tooth hub internal tooth is obtained, manufacturing procedure can be simplified, save processing cost.
The present invention also provides a kind of internal tooth impact forming methods 200, include the following steps:
S100: it is mobile towards the pushing core 50 that the upper pressing core 60 supports tooth hub to be processed, and with the pushing core 50
Contact；
When by needing to carry out internal tooth punching press to tooth hub to be processed, the output end elongation of first actuator 40, into
And push the upper pressing core 60 mobile towards tooth hub to be processed, until the upper pressing core 60 is contacted with tooth hub to be processed, from
And the upper pressing core 60 supports tooth hub to be processed on the supporting element 30, it is mobile towards the pushing core 50.
S200: the upper pressing core 60 clamps tooth hub to be processed with the pushing core 50 jointly and moves towards the formation die core 20
It is dynamic, and contacted with the formation die core 20；
Tooth hub to be processed is supported on the supporting element 30 by the upper pressing core 60, it is mobile towards the pushing core 50
In moving process, tooth hub to be processed is contacted with the pushing core 50, and the upper pressing core 60 and the pushing core 50 will later
Tooth hub clamping to be processed, the upper pressing core 60 and the core 50 that pushes clamp tooth hub to be processed later, and described first drives
The output end of moving part 40 continues to extend, and the output end of second actuator 70 is shunk, so that clamped tooth hub to be processed
It moves towards the formation die core 20, and is contacted with the formation die core 20.
S300: the formation die core 20 carries out elongational flow to the tooth hub to be processed of forming material interference portion, completes tooth
The processing of hub internal tooth.
It is disposed with the transition 21 from top to bottom by the formation die core 20, described face section 22 directly and described moves back
Expect section 23, and the transition 21, the tooth profile parameter design for facing section 22 and the material returned section 23 directly depend primarily on institute
The relevant parameter of molding tooth is stated, and after the completion of the design for facing section 22 directly, the transition 21 and the material returned section
23 design is completed.During clamped tooth hub to be processed and the formation die core 20 contact, tooth hub to be processed
Successively by the transition 21, it is described face section 22 and the material returned section 23 directly, the transition 21 and the section 22 of facing directly
Material interference part is understood tension stretch and is flowed, thus by the internal tooth punch forming of tooth hub, wherein the transition 21 can be right
Tooth hub to be processed carries out punching press, so that the first one-step forming of the internal tooth of tooth hub, the section 22 of facing directly described later can be to preliminary molding
Tooth hub internal tooth carries out final molding and finishing, is 8 °~10 ° by the taper that the transition 21 is arranged, so as to be processed
Tooth hub and the contact area of the transition 21 are stepped up, and then the tooth quantity of formed of tooth hub to be processed is stepped up, it is described gradually
The tooth tip diameter become in section 21 is designed according to the root diameter for facing section 22 directly, can be released on the transition 21 with this
Tooth tip diameter it is identical as the root diameter for facing section 22 directly.Total high flute profile depending on molding gear hub of the transition 21
Size.The top tooth profile parameter of the transition 21 is to carry out scaling according to the tooth profile parameter of facing directly for facing section 22 directly,
And the top tooth profile parameter of transition 21 and the ratio for facing tooth profile parameter directly for facing section 22 directly are 0.1~0.9.Due to described
The taper of the flank of tooth of material returned section 23 is 3 °~5 °, therefore carries out final molding and finishing in described 22 pairs of tooth hub internal tooths of section of facing directly
Afterwards, the material returned section 23 can facilitate separates between tooth hub internal tooth and the formation die core 20, facilitates the material returned of tooth hub, passes through
Calculating to size, obtains the design size of the formation die core 20, and obtains the size before the molding of tooth hub internal tooth, can simplify
Manufacturing procedure saves processing cost, improving production efficiency.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the present invention
Benefit requires made equivalent variations, still belongs to the scope covered by the invention.
Claims (10)
1. a kind of internal tooth punch forming mechanism, which is characterized in that
Including workbench, formation die core, supporting element, the first actuator, push core, upper pressing core and the second actuator, the molding
Mold core is fixedly connected with the workbench, and the supporting element is fixedly connected with the formation die core, and is located at the formation die core
One end far from the workbench, first actuator is fixedly connected with the workbench, and first actuator is defeated
Outlet is fixedly connected with the pushing core, and the core retainer plate that pushes is located at the periphery of the formation die core, the upper pressing core with it is described
Supporting element is slidably connected, and is set on the supporting element at the axial line center of the upper pressing core, and the upper pressing core is located at institute
State push core top, second actuator be set to formation die core surface, and the output end of second actuator with
The upper pressing core is fixedly connected.
2. internal tooth punch forming as described in claim 1 mechanism, which is characterized in that
The formation die core is disposed with transition from top to bottom, faces section and material returned section directly.
3. internal tooth punch forming as claimed in claim 2 mechanism, which is characterized in that
Tooth tip diameter on the transition is identical as the root diameter for facing section directly.
4. internal tooth punch forming as claimed in claim 3 mechanism, which is characterized in that
The top tooth profile parameter of the transition and the ratio for facing tooth profile parameter directly for facing section directly are 0.1~0.9.
5. internal tooth punch forming mechanism as claimed in claim 4, which is characterized in that
The taper of the transition is 8 °~10 °.
6. internal tooth punch forming as claimed in claim 5 mechanism, which is characterized in that
The taper of the flank of tooth of the material returned section is 3 °~5 °.
7. a kind of internal tooth impact forming method, which comprises the steps of:
It is mobile towards the pushing core that the upper pressing core supports tooth hub to be processed, and contacts with the pushing core；
The upper pressing core and the pushings core clamp tooth hub to be processed jointly and move towards the formation die core, and with the molding
Core contact；
The formation die core carries out elongational flow to the tooth hub to be processed of forming material interference portion, completes adding for tooth hub internal tooth
Work.
8. internal tooth impact forming method as claimed in claim 7, which is characterized in that
Total high flute profile size depending on molding gear hub of the transition.
9. internal tooth impact forming method as claimed in claim 8, which is characterized in that
The top tooth profile parameter of the transition carries out scaling according to the tooth profile parameter of facing directly for facing section directly.
10. internal tooth impact forming method as claimed in claim 9, which is characterized in that
Just one-step forming is carried out to tooth hub to be processed using the transition, then using the section of facing directly to preliminary tooth after molding
Hub carries out shaping and finishing, is later separated molding gear hub with the formation die core using the material returned section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910776752.XA CN110523902A (en) | 2019-08-22 | 2019-08-22 | A kind of internal tooth punch forming mechanism and its impact forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910776752.XA CN110523902A (en) | 2019-08-22 | 2019-08-22 | A kind of internal tooth punch forming mechanism and its impact forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110523902A true CN110523902A (en) | 2019-12-03 |
Family
ID=68662459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910776752.XA Pending CN110523902A (en) | 2019-08-22 | 2019-08-22 | A kind of internal tooth punch forming mechanism and its impact forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110523902A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000140990A (en) * | 1998-11-11 | 2000-05-23 | Aisin Aw Co Ltd | Method and device for production of helical tooth gear |
| CN101827667A (en) * | 2007-10-17 | 2010-09-08 | Gkn烧结金属股份有限公司 | Core rod forging for precise internal geometry |
| JP2011011225A (en) * | 2009-07-01 | 2011-01-20 | Sumitomo Electric Sintered Alloy Ltd | Method of sizing sintered part |
| CN206009609U (en) * | 2016-08-31 | 2017-03-15 | 广东恒宝精密科技股份有限公司 | A kind of internal tooth punching clamp device |
| JP2017052999A (en) * | 2015-09-09 | 2017-03-16 | 住友電工焼結合金株式会社 | Sizing die for ring-shaped sintered compact |
| CN108367397A (en) * | 2015-11-06 | 2018-08-03 | 许勒压力机有限责任公司 | The molding molding machine and method of inward flange for disk blank ring |
-
2019
- 2019-08-22 CN CN201910776752.XA patent/CN110523902A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000140990A (en) * | 1998-11-11 | 2000-05-23 | Aisin Aw Co Ltd | Method and device for production of helical tooth gear |
| CN101827667A (en) * | 2007-10-17 | 2010-09-08 | Gkn烧结金属股份有限公司 | Core rod forging for precise internal geometry |
| JP2011011225A (en) * | 2009-07-01 | 2011-01-20 | Sumitomo Electric Sintered Alloy Ltd | Method of sizing sintered part |
| JP2017052999A (en) * | 2015-09-09 | 2017-03-16 | 住友電工焼結合金株式会社 | Sizing die for ring-shaped sintered compact |
| CN108367397A (en) * | 2015-11-06 | 2018-08-03 | 许勒压力机有限责任公司 | The molding molding machine and method of inward flange for disk blank ring |
| CN206009609U (en) * | 2016-08-31 | 2017-03-15 | 广东恒宝精密科技股份有限公司 | A kind of internal tooth punching clamp device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201579334U (en) | Progressive die device with secondary molding process step | |
| CN104070129B (en) | Hot extrusion forging die for pipe with flange and deep blind taper hole shaft and forging technology thereof | |
| CN202539362U (en) | Small-angle conical part molding die | |
| CN102151775A (en) | Blind hole gear blank precise forming method | |
| CN109692911B (en) | Integral forming device and method for large-scale ring shell part | |
| CN206316303U (en) | The small gear ring radial direction wedge pressure mould of combination gear | |
| CN1785550A (en) | Forging method of soliding fork | |
| CN204524019U (en) | Shaft-cup shaping dies | |
| CN105921671A (en) | Backward extrusion forming method of stepped hollow shaft part and die | |
| CN102380545A (en) | Automobile suspension arm compound forming process and compound forming system utilizing same | |
| CN105537415B (en) | Elbow forming blank and pressing forming die thereof | |
| CN202479252U (en) | Backward extrusion die for aluminum alloy wheel rim of oversize vehicle | |
| CN110523902A (en) | A kind of internal tooth punch forming mechanism and its impact forming method | |
| CN103658213A (en) | Novel extrusion method for efficiently machining straight spur gear | |
| CN212944990U (en) | Special-shaped double-end-face tooth-shaped structure metal sleeve one-time forming device for automobile | |
| CN108971302B (en) | Processing method of thin-walled piece inner flanging | |
| CN214720253U (en) | Forming die tool for automobile air conditioner pressing plate | |
| CN110216221B (en) | Cold heading forming device of brake adjusting shaft sleeve and manufacturing method | |
| CN211803232U (en) | Thick wall elbow shaping mould | |
| CN204545163U (en) | One mould three mould | |
| CN109604390B (en) | Thin-wall sheet metal part forming method | |
| CN110886756A (en) | Special-shaped eccentric pin column and production process thereof | |
| CN102114497B (en) | Specially-shaped extruding female die of aluminium alloy seamless gas cylinder | |
| CN101254517A (en) | Silumin piston contour forging technique and mold | |
| CN216881392U (en) | Movable mould positioning guide pin structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191203 |
|
| RJ01 | Rejection of invention patent application after publication |